<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!-- 显示省 -->
    <select id="province">
        <option>选择省份</option>
        
    </select>
    <!-- 显示市 -->
    <select id="city">
        <option>选择市区</option>
    </select>
    
    <script>
        // 1、省市地区二级联动，页面加载完毕后显示出可以选择的省份，当省改变显示省份对应的市
        // 2、实现省市区三级联动(可选)
    </script>
</body>
</html>